Separable core.



w. R. DE NMAN. SEPAR ABLE CORE. APPUCATION FILED MAR.20,1916.

' Patented Aug. 1, 1916.

Inventor.-

WmZterR. De

nman,

' ments in collapsible or separable cores, de

. view. Fig. 3 a section on line AB of Fig.

i. NT orrron.

WALTER. n. DENMAN, or AKRON, oHIo SEPARABLE Conn. r

To all whom it may concern: 7

Be it known that I, WALTER R. DENMAN, a citizen of the United States,residing at Akron, Ohio, have invented certain new and usefulImprovements in Separable Cores, of which the following is aspecification.

My present invention relates to improvesigned for use in the manufactureof outer shoes or cases of pneumatlc tires.

One of the objects of the invention to provide a construction whichshall'be free from all small loose parts, such as screws or bolts andnuts, washers, etc., likelyto be misplaced when the core is removed.from the tire. I

Another object is to devise a core of this character which may be morequickly 1 assembled or taken apart than cores as heretofore constructed,so far as I am aware.

A further object is to so proportidn the separable parts that they maybereadily removed from between thebeads of the complete tire withoutspreading them apart to any materialeiitent.

-'I have alsoaimed minimum weight, ,and withal strong, durable andeflicient in use.

bination of parts hereinafter described and particularly defined by theappended claims,

an embodiment of the invention being illustrated in .the accompanyingdrawings in which Figure 1 is a side view. Fig. 2 is an edge 1. Fig. 4 asection on line C-D of Fig.1. F ig..5 is a view of details.

The core, as shown in these drawings,

' comprises three main sections, to wit, two

side rings-1; 1, and an intermediate ring 2..

Each of the rings 1 is divided up into a plurality of sections (fourbeing shown n the drawings) designated 1*, the divisionsbeingconveniently formed on lines radial ofi the core,"asindicated at 1". I O

The intermediate ring 2 s likewise d1: vided up into a plurality ofsections, four being shown in the drawings .designated 2",

. 2 2 and 2. The-linesof severance between most of these sections may beradial, as

' indicated at b, c, and drespectively, but the line of severancebetween two of the sec- The inventionincludes the novel features,offconstructmn and arrangement and-com f b n fi mm m Patented Aug.1,1916. Application filed mam, 191s. Seria1No. 85,4'70;

which are adapted to engage correspondinglyinclined or wedge shapedshoulders 1 and 1 on the side sections 1. In 'order to draw the sectionsfirmly together in the position shown in Fig. 3-and hold them in lockedengagement,;the side sections] 1 are recessed, as shown, to receivetheends of a clamping bar 6, which are located in recesses 69 in the ringsection 2. The clamping bar is carried on the inner end-of a fscrew atthreaded through 'a suitable .opening'extending ra-- dially of theringLand having one end 4" square for the reception of a suitableoperating.wrench, said head. being preferably countersunk in .itscorrespondingring sec t 1on as shown.- to provide a core of.

"Each. clamp'fi is rotatably' mounted upon its corresponding bolt,bemg-heldlthereon, by a suitable lock nut 7 and washerw7. As

before stated, the clamps 6 arerotatably mounted on bolts 4butfrictionm'eal ls. are

provided by, which, when-.thebolts' 4 are ro-- f tated, the clamps tendto -ro.tate'-therewith until arrested by some positive stop. -'SI10l1means may take the formof an annular expansion spring 4 resting in anannular groove in the :bolt orscrew 4: and havingan "inturned end 4engaging an .opening in-the screws bolt. When the core sections are assembled and readyjto be drawn tightly together the clamping. bars occupythe position shown in Fig. 3, extending transverselyfof the inner ring2and into the recesses in the.

side sections lfoverlappingthefshoulders 1 100 proper-directiondraws-the clamp bar down' against the shoulder 1 thus tends' to draw thecentral section 2 and the side sections 1 thereon. "Ther'otation ofscrew 4 in the in opposite directions,"causingthe. inclined orbeveledsurfaces '1? and-2 'tobe brought together with ;a wedging action, thusclamping the intermediate and side sections firmly together. Therotation'of the clamping bar beyond a position at right angles to theplane of the core, such as illustrated in Fig. 1

iio

and the core is to be removed from the fin-- ishedtire, the bolt isrotated in a reverse direction. lhe first tendency of this is to raisethe clamping bar from its seat and as soon as it is raised sutficientlyso that there is no friction between its ends and the shoulders 1 thefrictional engagement with the bolt' or screw,- caused by the frictionspring causes the clamping bar to beswung into a position longitudinallyof the core and wholly within the recesses in the central section 2. Inthe operation of removing the core the clamping bar in the section 2 ofthe ring 2, would first be swung into such 2 unlocking positions,allowing this section to be removed by reason of its non-radial abuttingface and thereafter the sections 2 2 and 2 may be similarl unlocked andremoved. These sections being very narrow, in comparison with the totalwidth of the core, may be removed without material spreg of thebeadededges of the tire. Thereafter the side sections may be moved laterallyto'bring them successively into the so space formerly occupied by thesections of the ring 1 and they may be successively removed in anyorder.

Pins 3 are provided in the sections of ring 2 to limit the reversemovement of the clamping bars so as to cause them tobe stopped in theproper lengthwise position to permit the removal ofthe said sections ofring 2.

This core isdesigned to be supported during the building of the tireupon a chuck having radially movable sustaining arms, and to providemeans for the engagement of such arms 1 preferably provide pins 5 whichare inserted in radial openings in the sections of ring 2 and areclamped therein by nuts 8 screwed onto the bolt and bearing againstspring washers 8 thenuts lying in recesses in the outer periphery of thering 2 and having their outer faces flush with the surface thereof andprovided with a kerf by which they may be operated by a screw driver. Itwill be understood, however, that the pins remain in the ring sections21]., all times except when they are to be remove'dand replaced byreason of Wear, or breakage.

A core embodying my invention, as above illustratedand described, canb'emade of extreme lightness, as by using a strong central steel ringforholding the chuck engag ing pins nd' locking partswhich receive thestrain and wear, I am enabledto make the ride ringQsQofv aluminum andalso of hollow form, as shqwn, without detracting from the strengthanddurability.

Having thus described my invention what I claim is-:

1'. A separable core comprising a central and two side rings, each ofsaid rings composed of a plurality of sections, with the sections of theintermediate ring breaking joints with those of the side rings and meanscarried by the central ring for clamping the side 'rings and centralrings together.

A separable core comprising intermediate and side rings divided intosections, with the sections of the intermediate rings breaking jointswith those of the side rings, said-intermediate and side rings havinginclined engaging faces and means carried by the intermediate ring forholding said in clined engaging faces in engaging relation.

3. A separable. core comprising intermediate and side sectional ringshaving interengaging flanges, clamping means carried by the sections ofthe intermediate ring adapted to be moved into and out of lockingengagement with the side rings and'means carried by the sections of theintermediate ring for opera-ting said clamping means.

' '11-. A separable core comprising intermediate-and side sectionalrings having interengaging flanges, rotatable clamping bars mounted inrecesses in the sections of the innor ring and adapted to be swung intoand. out of locking position with relation to the sections of the siderings and means operable from the inner faces of the sections of theintermediate ring for swinging said clamping bars.

5. A separable core comprising intermediate and side sectional rings,clamping bars movably mounted in recesses in the intermediate ring andhaving their ends adapted to be projected into recesses'in the siderings 105 and means operable from the inner periphery of the core,moving said clamping bars into and out of the recesses of the siderings.

6. A separable core comprising an intermediate and side rings havinginterengag- .110 ing shoulders or flanges, locking bars rotatablymounted in recesses in the sections of the intermediate ring and adaptedto be swung into positions in the plane of the core and also intopositions at right angles to 11 the plane of the core with their endsprojected into recesses in the side rings, rad'1 ally disposed screwmembers carried by the intermediate ring and connected with the clampingbars and adapted to move them radially of the core and also to swingthem on their axes and means for limiting the swinging movement of theclamping bars.

7. A'separable core comprising intermediate and side sectional ringshaving interchanging flanges, clamping bars mounted in recessesin. thesections of the intermediate ring and having ends adapted to-swing intooverlapping relation with shoulders'on the side rin motions, screwthreaded into said 130 ings inthe clamping bars, means for holdingclamping bars on said unthreaded portions, friction means interposedbetween said screw bolts and the clamping bars and stops tori limitingthe swinging movement of said clamping bars.

9. A core of the character describedhavv ing radial openingstherethrough, pins inserted in said openings and having chuck armengaging heads and nuts engaging the outer ends of the pinsandcounter-sunk in the outer periphery of the core.

10. A separable core comprising an intermediate and side sectionalrings, chuck engaging means carried by. the intermediate ring, lockingdevices for holding said rings together also carriedby the intermediatering, said intermediate ring being of steel and said side rings being oflighter material.

In testimony whereof, I affix my signature.

,WALTER -R. DENMAN.

Witnesses:

C. A. WOLF, M. D. MASKREY.

